Plumbing permits in Kent: fees, timeline & requirements (2026)
Everything you need to know about pulling a plumbing permit in Kent, Washington — when one is required, what it costs, how long review takes, what documents are required, and which inspections you can expect. Cited to Kent Economic and Community Development.
Free lookup, no account needed — the office that issues the permit at your address, cited to Kent's source.
When does plumbing work need a permit in Kent?
A plumbing permit is required for replacing plumbing/fixtures in the same location and for electric water-heater replacements; leak-stopping, clearing stoppages, and like-for-like water-closet reset are exempt. Typically processed within 2–3 business days.
In the source's own words
“For removing or replacing plumbing or fixtures in the same location without removal of any surfaces such as gypsum, framing, etc. Electric hot water tank replacements.”Source ↗verified 2026-05-29
Required submittals
- Fixture count + DFU calc for repipes
- Water heater specs
- Sewer line plan if site work involved
Inspection sequence
- Rough-in / pressure test
- Final
Contractor specialties needed
Plumber
Who can do this work in Kent?
Kolmo Construction is a licensed Washington general contractor — KOLMOL*753JS, active through April 10, 2027, bonded and insured — working throughout Kent and King County. Kolmo manages the plumbing job from start to finish: a licensed plumbing contractor performs the work and the permit, and Kolmo coordinates the scope, schedule, inspections and any related construction. Call (206) 410-5100 for a Kent plumbing quote.
Notes & caveats
Water heater: T&P relief, expansion tank required if pressure >80psi or check valve installed. Sewer line: cleanouts at every 100ft + change of direction. Backwater valve required in flood zones.
How to apply yourself
- 1. Check who issues the permit. Run an address lookup for your plumbing work in Kent — we'll confirm which office issues the permit at that address.
- 2. Assemble submittals: the 3 documents under Required submittals above.
- 3. Submit through the city portal: Kent Economic and Community Development ↗
- 4. Track review (typical: 2–3 days). Respond to reviewer comments promptly.
- 5. Pay issuance fees (Kent's fee schedule sets them) and pick up the permit. Inspection card travels with the job.
Or have Kolmo do it
Kolmo runs the job: a licensed plumbing contractor does the plumbing work and pulls the permit, and Kolmo coordinates the scope, schedule, inspections and any related construction.
Licensed WA general contractor KOLMOL*753JS · bonded & insured
Plumbing permits in Kent — FAQ
When does plumbing work need a permit in Kent?
A plumbing permit is required for replacing plumbing/fixtures in the same location and for electric water-heater replacements; leak-stopping, clearing stoppages, and like-for-like water-closet reset are exempt. Typically processed within 2–3 business days.
How much does a plumbing permit cost in Kent?
Kent issues its own plumbing permits, priced separately from the building permit, and the City's posted fee documents (its 2026 building permit fee table and land use fees) list no plumbing fees, so the Permit Center (253-856-5300) quotes them. Apply through the City of Kent Permit Portal (https://sso.kentwa.gov/).
How long does Kent take to review a plumbing permit?
Typical review window: 2–3 days.